Identify the correct set of stereochemical relationships amongst the following monosaccharides I-IV

Options

A. I and II are anomers: III and IV are epimers
B. I andII are epimers, III and IV are anomers
C. I and III are anomers, I and II are epimers
D. I and III are epimers, II and IV are anomers.

Answer

C

Explanation

(I) and (III) anomers because they have cange of configuration only at anomeric carbon.
(I) and (II) are epimers because they have change of configuration at a carbon other than anomeric.